About 90 percent of the equipment presented by the administration， as well as the facilities of our own， made good use of in the teaching.
| A．have | B．has | C．have been | D．has been |
_________ is known to all that he can't answer the question __________ he found the money.
| A．As; how | B．That; why |
| C．What; where | D．It; when |
I would gladly pay __________ for the book, because it is quite a use- ful one.
| A．twice as much | B．twice so much |
| C．as much twice | D．so much twice |
__________ with the size of the whole earth, the highest mountain does not seem high at all.
| A．When compared | B．Compare |
| C．While comparing | D．Comparing |
The number of people who __________ killed in the earthquake __________ reached 30，000.
| A．was; has | B．were; has |
| C．were; have | D．was; have |
He still does not get the point. How many times do I have to repeat myself to get it __________？
| A．through | B．opposite |
| C．across | D．past |